Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e15d23e156d25955953243f7396827937df4b2286c425312bcfc31b1f9a8daac' 
  AND token = 'jeJTZ9g8D2s52tSYWADo/E9uW9MMFEWR/q7LDCDx0SY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}